In terms of comparison, Magnus Carlsen, the world's current #1 and owner of the highest ranking ever, is 2-1-4 at the same tournament. Which is pretty typical; the best players draw a lot. Over his career, Carlsen has drawn almost 50% of the time and Caruana about 40%.

The modern times of chess have a new king, king Fabiano Caruana. One has to look back to 1968 where in Wijk Aan Zee the legendary Korchnoi started with 8,0/8. The times now are so different and the competition so fierce that already Fabiano's success can be proclaimed as the most memorable streak in the history of chess.

Along the way, Caruana has beaten Carlsen (#1), Levon Aronian (#2), Maxime Vachier-Lagrave (#9) twice, Hikaru Nakamura (#7), and Veselin Topalov (#6) twice. If you look at the unofficial live chess ratings, you'll see he has moved into the #2 position in the world, jumping a whopping 34.1 points in rating. He also owns the fourth highest rating in history, behind Carlsen, Kasparov, and Aronian. Caruana plays Carlsen again today, starting from the more advantageous white position. (via @tylercowen)

The best chess player in history, 23-year-old Norwegian Magnus Carlsen, has released an iOS app where you can play simulated games against Carlsen at various stages of his career, from age 5 up to the present. The Telegraph has the details.

Anyone who wants to find out more about his playing style can do so with Mr Carlsen's new app, which allows users to play him at the different levels he has achieved since the age of five.

The app is built on hundreds of thousands of different positions from Mr Carlsen's games, be they classical, rapid or blitz, to determine what moves he would make at those ages.

The aim is to promote chess among as many people as possible to make the sport more popular and accessible.

"The good thing is that you can play me at any age. At age five, anyone has a chance to beat me," Mr Carlsen said.

So what is it like for Mr Carlsen to play against his younger self?

"He is really tricky," the champion said. "Even Magnus at 11 years old was a very gifted tactician. A while ago I played as a test Magnus [aged] 14. I outplayed him at some point positionally. And just boom, boom, he tricked me tactically.

The Chess World Championship is currently underway in Chennai, India. Through nine games, challenger and world #1 Magnus Carlsen is leading reigning world champ and world #8 Viswanathan Anand by the score of 6-3. It seems as though Carlsen's nettlesomeness is contributing to his good fortunes.

Second, Carlsen is demonstrating one of his most feared qualities, namely his "nettlesomeness," to use a term coined for this purpose by Ken Regan. Using computer analysis, you can measure which players do the most to cause their opponents to make mistakes. Carlsen has the highest nettlesomeness score by this metric, because his creative moves pressure the other player and open up a lot of room for mistakes. In contrast, a player such as Kramnik plays a high percentage of very accurate moves, and of course he is very strong, but those moves are in some way calmer and they are less likely to induce mistakes in response.

Or perhaps Carlsen's just inspired by the lovely chess set they're using? Either way, he needs just one draw in the remaining three games to win the Championship. Or putting it another way, Anand has to win all three of the remaining games to retain the title.

Carlsen: I have no idea. I wouldn't want to know it anyway. It might turn out to be a nasty surprise.

SPIEGEL: Why? You are 19 years old and ranked the number one chess player in the world. You must be incredibly clever.

Carlsen: And that's precisely what would be terrible. Of course it is important for a chess player to be able to concentrate well, but being too intelligent can also be a burden. It can get in your way. I am convinced that the reason the Englishman John Nunn never became world champion is that he is too clever for that.

SPIEGEL: How that?

Carlsen: At the age of 15, Nunn started studying mathematics in Oxford; he was the youngest student in the last 500 years, and at 23 he did a PhD in algebraic topology. He has so incredibly much in his head. Simply too much. His enormous powers of understanding and his constant thirst for knowledge distracted him from chess.

SPIEGEL: Things are different in your case?

Carlsen: Right. I am a totally normal guy. My father is considerably more intelligent than I am.

His comparison of his abilities with Garry Kasparov's later in the interview is interesting as well.